The ten largest domes in the world ranked by clear span, from the 365-meter roof of The O2 down to the Oita Stadium.
Quick answer: 1. The O2 (Millennium Dome), 2. Singapore National Stadium, 3. AT&T Stadium, 4. Georgia Dome (demolished 2017), 5. Mercedes-Benz Stadium, 6. State Farm Stadium, 7. NRG Stadium (Reliant Stadium), 8. Caesars Superdome, 9. Tokyo Dome, 10. Oita Stadium (Showa Denko Dome).
Domes are architectural marvels that span vast open spaces without internal supports. This list ranks the ten largest domes in the world by clear span — the longest unsupported distance between structural supports — covering stadiums, entertainment venues, and landmark buildings. It's a reference for architecture enthusiasts, engineers, and sports fans interested in the scale of the world's largest covered structures. The ranking runs from largest to smallest, so rank 1 has the longest span.
The largest single-span roof structure in the world, with a diameter of 365 meters. Built in 1999, it covers the O2 Arena in London and is supported by 12 steel masts, technically making it a tensioned fabric canopy rather than a rigid dome.
The largest rigid dome in the world, with a clear span of 310 meters. Completed in 2014, its retractable roof covers a 55,000-seat sports and entertainment venue.
The largest domed stadium in the United States, with a clear span of 275 meters. The retractable roof of the Dallas Cowboys' home stadium in Arlington, Texas, covers an 80,000-seat venue with a distinctive arched profile.
The former home of the Atlanta Falcons, with a 240-meter clear span that made it the largest cable-supported dome in the world when it opened in 1992. It was imploded in 2017 and replaced by Mercedes-Benz Stadium.
The Atlanta Falcons' current home matches the Georgia Dome's 240-meter clear span, with a retractable roof of eight triangular petals that open like a camera aperture. It opened in 2017 on the site of its predecessor.
The home of the Arizona Cardinals in Glendale, Arizona, features a 229-meter clear span retractable roof. The stadium's natural grass field rolls out on a massive tray for outdoor games.
The home of the Houston Texans, with a 225-meter clear span retractable roof. It was the first NFL stadium with a retractable roof when it opened in 2002.
The home of the New Orleans Saints, with a 210-meter clear span. Its fixed dome roof, completed in 1975, has survived multiple hurricanes and hosted seven Super Bowls.
The iconic 201-meter span dome in Bunkyō, Tokyo, home of the Yomiuri Giants baseball team. Its distinctive white, air-supported dome opened in 1988 and is one of the most recognizable stadiums in Japan.
A 200-meter clear span dome in Ōita, Japan, designed by Kisho Kurokawa. It was built for the 2002 FIFA World Cup and features a distinctive retractable roof that opens in two halves.
| # | Name | location | yearCompleted | type | use |
|---|---|---|---|---|---|
| 1 | The O2 (Millennium Dome) | London, England, UK | 1999 | Tensioned fabric canopy (cable-net) | Entertainment venue |
| 2 | Singapore National Stadium | Singapore | 2014 | Retractable dome (steel frame) | Multi-purpose stadium |
| 3 | AT&T Stadium | Arlington, Texas, USA | 2009 | Retractable dome (steel frame) | NFL stadium |
| 4 | Georgia Dome (demolished 2017) | Atlanta, Georgia, USA | 1992 | Cable-supported dome (Teflon-coated fiberglass) | NFL stadium (demolished) |
| 5 | Mercedes-Benz Stadium | Atlanta, Georgia, USA | 2017 | Retractable dome (steel and ETFE) | NFL stadium |
| 6 | State Farm Stadium | Glendale, Arizona, USA | 2006 | Retractable dome (steel frame) | NFL stadium |
| 7 | NRG Stadium (Reliant Stadium) | Houston, Texas, USA | 2002 | Retractable dome (steel frame) | NFL stadium |
| 8 | Caesars Superdome | New Orleans, Louisiana, USA | 1975 | Fixed dome (laminated wood frame) | NFL stadium |
| 9 | Tokyo Dome | Bunkyō, Tokyo, Japan | 1988 | Air-supported dome (fabric roof) | Baseball stadium |
| 10 | Oita Stadium (Showa Denko Dome) | Ōita, Japan | 2001 | Retractable dome (steel frame) | Multi-purpose stadium |
Domes are ranked by clear span in meters (the longest unsupported distance between structural supports), using figures from structural engineering references, venue technical specifications, and Guinness World Records as compiled in Wikipedia's "List of largest domes" and cross-checked against architectural databases. Only structures with a continuous roof covering a clear span are included; tensioned fabric structures such as The O2 are included because they enclose a full clear span, and retractable roofs are measured in their closed configuration. The ranking runs from largest to smallest span.
The O2 (Millennium Dome) in London has the largest single-span roof in the world at 365 meters, though it is technically a tensioned fabric canopy. The largest rigid dome is the Singapore National Stadium, with a 310-meter clear span.
The O2 in London has the largest diameter of any single-span roof structure at 365 meters. Among rigid, self-supporting domes, the Singapore National Stadium (310 m) holds the record, followed by AT&T Stadium (275 m).
Yes. The Pantheon's 43.3-meter diameter dome, built around 126 AD, remains the largest unreinforced concrete dome in the world, nearly 1,900 years after its construction.
Modern domes use lightweight materials like steel, ETFE (a durable plastic), and fabric membranes, supported by advanced cable-net and truss systems. Traditional domes, like the Pantheon or St. Peter's Basilica, rely on masonry and concrete compression rings.